Illuminate\Support\Collection::forPage PHP Method

    public function forPage($page, $perPage)
    {
        return $this->slice(($page - 1) * $perPage, $perPage);
    }

 /**
  * Paginate the results of this query
  *
  * @param  int
  * @param  int
  * @return $this
  */
 public function paginate($perPage, $page)
 {
     if ($perPage > 0) {
         $this->collection = $this->collection->forPage($page, $perPage);
     }
     return $this;
 }